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    <title>小游戏-神经衰弱</title>
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<div class="concentration" id="js-concentration">
    <div class="cover" id="js-cover">
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        <h1 class="cover_title"><span>神</span><span>経</span><br/><span>哀 </span><span>弱</span></h1>
        <dl class="coverNumber">
          <dt class="coverNumber_heading">卡片张数</dt>
          <dd class="coverNumber_body">
            <select id="js-cardsNumber">
              <option value="10">10</option>
              <option value="20">20</option>
              <option value="30">30</option>
              <option value="40">40</option>
              <option value="52" selected="selected">52</option>
            </select>
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    <div class="stage">
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      <p class="stage_timer" id="js-timer">00:00:00</p>
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